SELF-PROPELLED SUBMARINE SIMULATOR Russian patent published in 1994 - IPC

FIELD: apparatuses of underwater acoustic counteraction used for submarine simulation. SUBSTANCE: screw propeller in the self-propelled submarine simulator is made as an extended inner propeller shaft, secured on which are the propellers of the first sense of rotation and of the second sense of rotation, which additionally carries two radially extending attachments of propellers of the outer shaft; the other ends of each propeller of the outer shaft are attached to the outer race of the respective bearings; besides the bearing inner races are secured on the extended inner shaft; the propellers of the inner shaft and propellers of the outer shaft alternating are located along the entire length of the extended inner shaft; the distance between the propellers of the first - second senses of rotation is the same, and the number of pairs of propellers of the first-second senses of rotation determining the value of shaft extension equals n₂/n₁, where n₁ is the rpm of submarine propellers for the selected speed of employment of simulator of the preset submarine design; n₂ is the rpm of propeller shafts of the self-propelled submarine simulator of the preset design, corresponding to the selected speed. EFFECT: enhanced truth of simulation of primary underwater acoustic field of submarine. 1 dwg